Do not open the project with Xcode yet! Go to the “Resources/Build Configurations” folder and, using a text editor like TextEdit (not Xcode), edit the “Code Signing Identity.xcconfig” file. In CODE_SIGN_IDENTITY, set the name of the self-signed certificate you created before, in my case, “User”. Then, empty the two other variables.

Save and close that file, enter the “Standard Release” folder, and using a text editor (again, not Xcode) open the “Enabled Features.xcconfig” file. You’ll see a few flags in the GCC_PREPROCESSOR_DEFINITIONS line, you’ll have to disable them all (set them to 0), but leave TEXTUAL_BUILT_WITH_ADVANCED_ENCRYPTION on.

Now, go to the root folder and open the Xcode project (double click it, that is).